Security update for python-Authlib
This security update for python-Authlib addresses three critical vulnerabilities: a signature bypass in JWS deserialization due to accepting user-controlled embedded JWK as verification key (CVE-2026-27962), a cryptographic padding oracle in the JWE RSA1_5 key management algorithm (CVE-2026-28490), and a fail-open behavior in OIDC hash validation that allows bypassing mandatory integrity protections (CVE-2026-28498).
AI Analysis
Technical Summary
The update for python-Authlib fixes three critical security issues. CVE-2026-27962 involves the JWS deserialize_compact() function allowing signature bypass by accepting a user-controlled embedded JSON Web Key (JWK) as the verification key. CVE-2026-28490 is a cryptographic padding oracle vulnerability in the JWE RSA1_5 key management algorithm, potentially allowing attackers to exploit padding weaknesses. CVE-2026-28498 describes a fail-open behavior in OpenID Connect (OIDC) hash validation that permits bypassing mandatory integrity protections. These vulnerabilities collectively impact the cryptographic security guarantees of python-Authlib.
Potential Impact
Exploitation of these vulnerabilities could allow attackers to bypass signature verification, exploit cryptographic padding weaknesses, and circumvent integrity protections in OpenID Connect flows, potentially compromising authentication and message confidentiality/integrity in applications using python-Authlib.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Users should monitor SUSE Product Security Team advisories for official fixes and apply updates promptly once available.
Security update for python-Authlib
Description
This security update for python-Authlib addresses three critical vulnerabilities: a signature bypass in JWS deserialization due to accepting user-controlled embedded JWK as verification key (CVE-2026-27962), a cryptographic padding oracle in the JWE RSA1_5 key management algorithm (CVE-2026-28490), and a fail-open behavior in OIDC hash validation that allows bypassing mandatory integrity protections (CVE-2026-28498).
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The update for python-Authlib fixes three critical security issues. CVE-2026-27962 involves the JWS deserialize_compact() function allowing signature bypass by accepting a user-controlled embedded JSON Web Key (JWK) as the verification key. CVE-2026-28490 is a cryptographic padding oracle vulnerability in the JWE RSA1_5 key management algorithm, potentially allowing attackers to exploit padding weaknesses. CVE-2026-28498 describes a fail-open behavior in OpenID Connect (OIDC) hash validation that permits bypassing mandatory integrity protections. These vulnerabilities collectively impact the cryptographic security guarantees of python-Authlib.
Potential Impact
Exploitation of these vulnerabilities could allow attackers to bypass signature verification, exploit cryptographic padding weaknesses, and circumvent integrity protections in OpenID Connect flows, potentially compromising authentication and message confidentiality/integrity in applications using python-Authlib.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Users should monitor SUSE Product Security Team advisories for official fixes and apply updates promptly once available.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- SUSE Product Security Team
- Advisory Id
- openSUSE-SU-2026:20392-1
- Cve Count
- 3
- Additional Cves
- ["CVE-2026-28490","CVE-2026-28498"]
Threat ID: 6aab499155bf5e2cf5990f45
Added to database: 09/17/2026, 01:59:45 UTC
Last enriched: 09/17/2026, 02:31:16 UTC
Last updated: 09/17/2026, 02:31:16 UTC
Views: 2
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